Product Comparison: Central Air Conditioner

  Evolution System
Evolution® System		 Preferred Series
Preferred™ Series		 Preferred Compact
Preferred Compact 538A		 Legacy Line
Legacy™
Performance
Efficiency SEER Up to 20 SEER Up to 16 SEER Up to 15 SEER Up to 16 SEER
Efficiency EER Up to 14.5 EER Up to 11.5 EER Up to 12.5 EER Up to 11.5 EER
ENERGY STAR® Check Check Check Some models
Puron® Refrigerant Check Check Check Some models
R-22 Refrigerant       Some models
Two-Stage Scroll Compressor Check      
Two-Stage Reciprocating Compressor Check      
Sound
Quiet Level As low as 72 dB As low as 67 dB As low as 66 dB As low as 74 dB
AeroQuiet™ System II Check Check    
Controls
Evolution Control Ready Check Check Check  
PerfectHumidity® Check Check Check  
Evolution Diagnostics Check Check Check  
Durability
DuraGuard™ Plus Check Check    
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